3Com WX1200 Reference Manual page 450

450 C 16: M
HAPTER ONITORING THE
value at end of polling interval - value at beginning of polling interval
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Table 57 RF Trends Columns
Column
Radio
SNR
Throughput
Authorized Clients
Client Failures
802.11 Packet Errors
Non-802.11 PHY Errors Number of times the radio detected energy on the active
Re-transmits
Receiver Threshold
Noise Floor (dBm)
If the SNR, Associated Clients, or Receiver Threshold column is red, this
indicates that the threshold configured for this parameter has been
exceeded. (See "Changing Monitoring Settings" on page 503.)
When looking at graphed data, you can see the data in absolute or delta
values.
Delta (rate of change) values are calculated with the following equation:
time difference (in seconds)
Description
MAP name and radio number.
Signal-to-noise ratio of the last data packet received by the
radio.
Rate at which data is transmitted by the radio, in bits per
second.
Number of authorized clients associated with the radio.
Combined number of the following types of errors:
802.1X failures
association failures
authentication failures
authorization failures
Number of frames received by the MAP radio that had
physical layer errors on the active channel. These errors
can indicate interference from a non-802.11 device.
channel that either was not recognizable as an 802.11
frame, or was above the power level of background noise.
Number of retransmitted packets sent from the client to
the radio on the active channel. Retransmissions can
indicate that the client is not receiving ACKs from the MAP
radio.
Radio's hearing sensitivity, in decibels (dB).
Received signal strength at which the MAP can no longer
distinguish 802.11 packets from ambient RF noise. A value
around -90 or higher is good for an 802.11b/g radio. A
value around -80 or higher is good for an 802.11a radio.
Values near 0 can indicate RF interference.